Fuhrer Andreas, Fröberg Linus E, Pedersen Jonas Nyvold, Larsson Magnus W, Wacker Andreas, Pistol Mats-Erik, Samuelson Lars
The Nanometer Structure Consortium, Lund University, Box 118, S-221 00 Lund, Sweden.
Nano Lett. 2007 Feb;7(2):243-6. doi: 10.1021/nl061913f.
We report on fabrication of double quantum dots in catalytically grown InAs/InP nanowire heterostructures. In the few-electron regime, starting with both dots empty, our low-temperature transport measurements reveal a clear shell structure for sequential charging of the larger of the two dots with up to 12 electrons. The resonant current through the double dot is found to depend on the orbital coupling between states of different radial symmetry. The charging energies are well described by a capacitance model if next-neighbor capacitances are taken into account.
我们报道了在催化生长的InAs/InP纳米线异质结构中双量子点的制备。在少电子体系中，从两个量子点都为空开始，我们的低温输运测量揭示了一个清晰的壳层结构，即两个量子点中较大的那个量子点依次填充多达12个电子。发现通过双量子点的共振电流取决于不同径向对称性状态之间的轨道耦合。如果考虑最近邻电容，则充电能量可以用一个电容模型很好地描述。
